Intermediate shield for pneumatic tires.



I. B. SMILEY.

INTERMEDIATE SHIELD FOR PNEUIVIATIC TIRES.

APPLICATloN FILED 00116. 1913.

l ,l 60,334. Panented Nov. 16, 1915.

'QQLUMBIA FLANDGRAPH cu., WASHINGTDN. D. c.

entre srans naar i onirica JOHN B. SMILEY, OF SOUTH OMAR'A, NEBRASKA.

ITERMEDIATE SHIELD FOR PNEUMATIC TIRES.

To all whom t may concern: 'l

Be it known that l, JOHN B. Stirner, a citizen of the United States, residing at South Omaha, inthe county of Douglas and State of Nebraska, haver yinvented certain new and usefullmprovements in Intermedi* ate Shields for Pneumatic Tires, of which the following is a specification.v

This yinvention relates to intermediate means for lconstructing the shield, and in'- cludes the process "of its manufacture ask well as the shield `itself.

ln describing; the invention 'reference' is made to the accompanyingdrawing, whereiny Figure l is a view of `a wlieeltire in transverse section, s'hcwingthe intermediate shield; Fig. is a plan' view, on a reduced scale, of a curingwheel; ig. 3 is a view, partly broken and intransverse section, of the curing-wheel, the shield anda part of a compress being alsoshown. Fig. 4 isa plan View" cf a mold. Fig. 5 is atransversesection of the mold on an "enlarged scajle,`fthey shield, partly broken away, also beii'ig` shown. Fig. 6 isa plan view of a metallic plate. Fig. 7 is a view in transverse'section i showing the arrangement of the metallic plates. y

longitudinally ofV ancladapted to be disposed between the outer casing 9 and inatedfcasing 10. T he other parts of the shield consist of a first layer le of metallic strips`,f' a sec# ond or inner layer 15 yoflnretzillic"strips and a composition of matter y16 varrangted, in layers and so proportionedy that the shield thus provided may longitudinallyjcircum! scribe the inner casing while supportedby the outercasing, said shield or `shieldingstrip being provided at its edges withr anchor-members or enlargedpartsy u-and hav ing;` midway between said enlarged parts'a,

an inwardlyprojecting part `or barrier mein! ber c, the anchor-members or parts a being Specification of Letters Patent.

adapted to beadisposed between the flangesy of the wheel-rim 17 for preventing a trans-` verse movement of the shielding strip,y and thereby maintaining the barrier-member in the vertical plane outwardly of the longitudinal aXis of the tire. 'Y

The ingredients employed for the co1`nposition of matter provides a miXture which is` adhesive and may be molded in any de;`

sired form, and when vulcanized it is elastic and has the consistency of rubber. A mold 1Smay be employed having a length equal PatentedNov. 16, 1915. Application fnedoctdber 1e, 191e.' serial No. 795,445.

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to the circumference of the casings andpre'ferably having a `groove o conforming`sub`- stantiallyto the curvature, 1n cross-section of the casing 9,pa`nd in which may be laid the strips of fabric and 11, and when the shield is completed .these strips are Vad'aptedto be disposed adjacent'to the inner wall casing n Uponthe strip'of fabric l1 is then ldis-A posed a layer y"of `thecomposition of ^matt`er.

Layers'le: and l5 ueach consist of plurality 'Y' of substantially 'parallel ymetallic" stripsli)v` (Fig: 6) placed side by side transversely the tire and embedded inthe composition of matter. The curvature of these strips, `as shown in Fig. 1, corresponds substantially tothek curvature, inu cross-section, of the tire and the metallic plates of said adjacentlydisposed layers llandl are vso arranged with reference'to each other that the edges of the plates of one layer will be disposed midway between the edges of themetallic plates ofthe adjacent layer.' Layers lfl' and 15 provide a ybarrier entending entirely around tlieinnercasing, and pieces of glass,

` 1 nails or other objects which may penetrate The shield 8 or 'shieldingstrip for the l inflated casing consists', in part, of strips of theouter casing will be deflected by operation of layers le and 15, yand said layers will protect the inflated tire from injury.

The anchoremembersor enlargedparts a of the shieldmay be formedby any suitable means, theV means shown herein for this nurpose being the end-portions of the flexible strips 11 and 11 which may be folded and a quantity of the composition l`of matter employed as shown in the drawing, and as above mentioned they operate to prevent ka sidewise sliding movement of the shield after it has been placed between the two casings, this being desirable since the inwardly-projecting.and comparatively thick annular portion b should be maintained ad jacent to the periphery ofthe casing.

In the construction ofthe shield, the particularl'numberu ofcomparatively marrevv A flexible strips 13 employed is not important,

and I may use a greater or-lesser number or these strips. They adhere to and are embedded in the composition offmatter, ,and in connection With said composition of matter theylform theinvvardly, projectingxpart or annular cushion having a less Width than the Width of the Wheel-rim`17 and on oc? In order. that the shield may ing ysemi-plastic lin consistencyy sof that,

Whilesaid mixture provides Aa filler between Y *thickness theifabrics and between ,they metallic plates,

itfv'vill be, adhesive and of :such'ahdegree of `solidity that .the several layers ofthe comf V poundwhichirnaiyfbe 'fgreater 0r A,lesser s ',V vvilly maintain their formvvhen removed vfrimn'the mold. f Y I have" used to advantage composition ol matter, a mixture, in bulk, of

pipulveriz'ed' asbestos,il() per cent., pulverized "cork, `l0 .perr cent., *pulverized rubber, 60

per cent.,rubbercement'paste 20 per cent,

and-haveusedaV sufficient .quantity of gaso- `leiie With said ingredients to provide a mix- ,i Vture which is semi-plastic,4 rThe asbestosis `used for the reason that 1t is a nonconductor Y the gas soy of'heat; Ytheuse oficorlrY is an advantage asi a filler since itis of lightweight; vthe rubber provides elasticity; the lpaste is adhesive;y f, and theV gasolene operatesV as a binder sinceA escapes during the operation o'.V

heating.` Y ,o p n Y The proportions above named, may fb@ changed if deslre'dto provide a greater or a lesser 'degree roffelasticity for the' shield.

VV`TheAasbestosvmaybe omitted and 20' per cent. of corkmay be substituted, kor the corlr may be omitted yand 2013er cent-of asbestos maybeused, the other parts and proportions remaining the s same ;v and the quantity of 4 f "rubber may be decreased if desiredtoQO per-V cent., they asbestosV and cork ,being increased to 2O per cent. each; or,'if desired, v,the quantityv of rubber may be increased; to 80per -cent.the asbestos andcorli` being omitted; i o l also the rubber-cement paste may be de-j' creased t0V 1Y0,- pizrentif; desiredsaid ticity and a degree of Vsolidity suiicient to.. maintain, normally, the segmental orin "*slioivn i1i-Fig."l, and to the end that it will'` be durable and thatthemetallic plates and" strips of fabric `Will be maintained ink theA relativek positions substantially. asv shown inV A, thefdrawing'l employ a composition of mate terconsisting of a mi'Xturejof'a'sbestos, cork, i rubber," ga'soleneV andpaste,r the asbestos', Y corkfand rubber being ground ,orypulverized,-

said Yingredients when thoroughly miXed'be'- for lthe above Ai'terthef'mold'has-been lemployed to form the shield, the. latter will have a form, in cross-section, substantially i as .shown in Fig. 5, and it is thenlaid on a circular, me-

..tallic memberY 20,1forfconveniencercalled a curing-Wheel, the periphery of said member having a-groove d With a curvature correspending to the curvature of the innerY side or' the shield/.""Conrpresses or Wet bandages 21 (Fig. 3;) are then Wound Y.around thetire 75' of Wheel 20 the bandages also covering the' shield, and said vWheel and the shieldY thusv sup p ort-ed, are 1 then subjected to, steami Aheat in a suitable curing vat similarftov thecur'- i, ing'vats used for ordinary rubber tiresftheo result ofthisexposure to the heatheir'igfthatH Y the composition of 'matter Willbe vulcanizedy andsolidilied to the consistency'tot.iubbei The shield thus provided ivill have 'anfelas-lv ticityv substantially the same fas rubber, vandas the metallic layers and :fabric strips vvillbef,V

. embedded therein sov that they ivill be ,main-fv tained in 'substantially vthe 'relative f shown in Vthe"drawing,

i0n aejcount of thev form oftheshieldfit y96" tends tlpreventfaY blow-out in instances: Where the outer tire may Vbe considerably' Wornv or weakened. WheelQ'O shouldfbelcon-Q structedfot:metalsovthat be a goed"` f;

conductor of heat to causelvulcani'zation'of 95 both the inner andouterpart's olftheannu lar shield. l" Y While I have ysliovv'n and-described a reef'V tilinear mold 18providedwithalongitudi-H nal'groove, a'nd'vvhile, agmold is Yquiteznecesf- 166 sary for use kin forming the severalllayers'as l Well 'asa metallic'moldy for curingnor vulffl canizing the shield, Ido not Wishto limitd myself in this respect, rsince moldslof otherg s forms maybe employed. p, :Y y ,I i Thefshield thus. described provides `Aa jacket i vWhich i may` completely envelopl the inner casing, vrand the'inner flexible strip should beof sufhcient Width to perrnitfthe,d fp' partsnear its 1edges to overlap, as indicatedfli at ein F ig. l; and when the innercasing is inflated, the shield will operate to reinforce all parts ofthe' casing so that the .chances for anv occurrence of a ,VYbloyv-Aoutwvvill beyreduced to a minimum. s j 4 f 115 NumeralsfQQ and 23 indicate,`respectively, l the felly and one ofthespokesfof a vehicle Wheel. While the construction as described; is such that the inwardly projecting cushion L; b of theshield Will be normally disposed 'in '120 Vthe lverticalplane of the' longitudinalairis of Gtheftire, and the annular lrecesses or groovesf of the. shield Will be equi-distant from' said axis and 'Will-correspond in gourd-i ,f.

vature to the curvature 'of the annular ridgesf125 g of; the curingvvheel 20, this being the pre-. ferred 'constijuction,` ll do` not vvish` to be; understood as limiting myself to theserfeao-j tures, the' PnCipal Object, 0f th invention.`r at being 't0 .prevde Suitable .mounting :for fm the metallic plates which will be effective to permit layers la and l5 to expand and contract and also will be operative for maintaining them in the relative positions mentioned, and the composition of matter and its application as described, together' with the operation of molding and vulcanization referred to have been found to be of advantage for these purposes.

Having fully described my invention, what I claim and desire to secure by Letters Patent is,-

An intermediate shield for pneumatic tires, comprising strips of fabric adapted to longitudinally circumscribe the inflated tire, a first layer consisting of metallic plates disposed side by side transverselyT of the tire intermediate the strips of fabric, a second layer of metallic plates disposed side by `plates intermediate the strips of fabric with their longitudinal edges disposed midway between the longitudinal edges of theyfirst layer of metallic plates, a plurality of iexible strips disposed outwardly of and circumscribing the inflated tire, an elastic filler disposed between the 'layers of metallic plates and between the strips of fabric andV said layers of metallic plates, said elastic filler also enveloping each of said flexible strips to form adjacent to the tread an inwardly projecting annular ridge.

In testimony whereof I have aiiixed my signature in presence of two witnesses.

JOHN B. SMILEY. Witnesses:

HIRAM A. STURGES, L. M. THOMAS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

